California's investor-owned electric utilities send power through roughly 200,000 miles of overhead transmission and distribution lines and an additional 70,000 miles of underground lines.
For a map of the major transmission lines, please see the On-Line Energy Maps page.

Power Plants

California produces roughly 70 percent of its electricity from power plants located within our state and from plants that are outside of the state but owned by California utilities.
About 30 percent is imported electricity from the Pacific Northwest and the American Southwest.
In 2010, the total electricity imported was 92,130 gigawatt-hours.

The installed capacity of the 1,008 in-state power plants (greater than 0.1 megwatts - MW) totals 69,709 MW.
These plants produced 205,695 gigawatt-hours of electricity in 2009.